A parachutist lands on mars and stops in 0.5 s. The person suffers some injury due to shorter landing time. Explain how he could easily reduce this force
Answers
Answer:
The committee categorized the hazards on Mars by their sources or causes. It has specifically defined physical hazards on Mars separately from the chemical and biological hazards, because physical hazards can threaten crew safety by physically interacting with humans or critical equipment, resulting, for example, in impact, abrasion, tip-over (due to an unstable Martian surface), or irradiation.
It is known that the gravitational force that will be experienced by humans on the Martian surface is approximately 3/8 (0.375) that on Earth. The committee notes that very little, if anything, is known about the long-term effects on human health from residing in a 3/8 Earth gravity environment. These long-term effects could represent a hazard to astronauts on Mars. However, since no further precursor missions are necessary to quantify the gravity on Mars, the committee has not included the low-gravity environment in the hazards discussed in this report.
The physical environments that might pose risks to crew safety on Mars fall into three categories: geologic, atmospheric, and radiation. This chapter elaborates on each of those categories in light of what is currently known about the hazards and what needs to be known in order to establish confidence in the safety of human missions to Mars.